Manufactured by Namura Kit includes piston, rings, pin, clips you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Kit is for standard bore size 83.00mm Piston is 82.95mm 9.2 1 Standard compression ratio Made in Taiwan Fits 1987 Yamaha Big Bear 350 4x4 YFM350FW 1988 Yamaha Big Bear 350 4x4 YFM350FW 1989 Yamaha Big Bear 350 4x4 YFM350FW 1990 Yamaha Big Bear 350 4x4 YFM350FW 1991 Yamaha Big Bear 350 4x4 YFM350FW 1992 Yamaha Big Bear 350 4x4 YFM350FW 1993 Yamaha Big Bear 350 4x4 YFM350FW 1994 Yamaha Big Bear 350 4x4 YFM350FW 1995 Yamaha Big Bear 350 4x4 YFM350FW 1996 Yamaha Big Bear 350 2x4 YFM350U 1996 Yamaha Big Bear 350 4x4 YFM350FW 1997 Yamaha Big Bear 350 2x4 YFM350U 1997 Yamaha Big Bear 350 4x4 YFM350FW 1998 Yamaha Big Bear 350 2x4 YFM350U 1998 Yamaha Big Bear 350 4x4 YFM350FW 1999 Yamaha Big Bear 350 2x4 YFM350U 1999 Yamaha Big Bear 350 4x4 YFM350FW